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We highly recommend using a surfactant with Sedgehammer 1.33 ounce bottle.

Sedgehammer in the 13.5 gram box already contains surfactant.

SedgeHammer herbicide kills nutsedge without injury to turfgrass, established ornamentals, shrubs, and/or trees. SedgeHammer provides post-emergence control of both purple nutsedge and yellow nutsedge. SedgeHammer also controls many broadleaf weeds and suppresses kyllinga. Nutsedge is controlled after emergence in cool and warm season turf grasses such as St. Augustinegrass, Bermudagrass, Kentucky Bluegrass, tall and fine fescue, and perennial ryegrass. Sedgehammer is considered one of the more "gentle to turfgrass" products and pets and people can return to the treated area once the spray dries.

Sedgehammer is the exact same product as Manage Herbicide. The Gowan Company purchased the Manage product and its rights to use from Monsanto in early 2005 and now sells the very same product as Sedgehammer.

How SedgeHammer Herbicide Works

SedgeHammer is a water-soluble granule formulation that is mixed with water and applied to target plants with a sprayer. SedgeHammer is a member of the sulfonylurea family, an ALS (acetolactate) enzyme inhibiting herbicide. The active ingredient is absorbed into leaf tissue as quickly as 24 to 48 hours after application, then translocated through the plant’s vascular system. The herbicide quickly inhibits amino acids, halting cell division and plant growth in both roots and shoots, causing eventual death in target plants.

A nonionic surfactant is an additive that aids the penetration of SedgeHammer into the plant tissue. Surfactants are not only used in horticulture but are commonly used in many cleaning products. Their properties enable the herbicide to “sheet” or spread across the surface of a plant or weed. It is always recommended that a surfactant be used to help SedgeHammer penetrate the waxy layer of the nutsedge leaf. The surfactant also aids in dispersing the water droplets evenly across the leaf tissues and facilitates adsorption into the vascular system of the plant.

Target Uses of SedgeHammer

SedgeHammer Herbicide is a selective, post-emergent herbicide concentrate designed specifically to kill nutsedge and other broadleaf weeds without injury to turfgrasses, established ornamentals, shrubs, or trees. SedgeHammer can be used in both warm-season and cool-season turfgrasses, landscaped areas, and other non-crop areas.

SedgeHammer will not prevent germination of most labeled target weeds. Rather, it should be applied to actively growing weeds. If turfgrass or nutsedge is under stress, poor control may result. Also, desirable turfgrass, ornamentals, and trees should be well established before application. Do not apply to edible plants or gardens.

*Note that weeds can develop resistance to herbicides. To minimize the potential for resistance development and/or to control resistant weed biotypes, use a variety of cultural, mechanical, and chemical weed control tactics. Rotate with herbicides having other modes of action.

SedgeHammer Application Instructions

HNo one likes weeds popping up in and around their yard! Sedgehammer and Sedhammer Plus is the industries most popular herbicide that kills and controls various types of unwanted weeds.

SedgeHammer is a powder concentrate to be diluted with water and applied with a pump sprayer. SedgeHammer should not be applied with hose-end sprayers since they are far less accurate than hand pump sprayers. When applying, spray the weeds thoroughly and wet the entire leaf surface of the undesirable plants. For best results, spray nutsedge after it has reached the 3 to 8 leaf stage of growth.

SedgeHammer often works with one application, but depending on the size and age of the nutsedge a second treatment may be required 6 to 10 weeks after the initial treatment. See “Other Tips” below for more information.

For best results, add a surfactant that is specifically made for horticultural purposes and labeled for use with an herbicide. Use only surfactants that contain at least 80 percent active material. Do not exceed the recommended amount of surfactant due to potential turf injury at higher rates.

*While spraying, periodically swirl or shake the mixture to keep the product evenly distributed in the water.*Do not store the mixed solution as it will degrade and become ineffective.

The 13.5 gram packets already contain a surfactant, so you only need to mix the contents of the packet itself with a gallon of water. See below for further details. Always read the product label completely before use.

*13.5 g packet – Entire contents of 1 packet (0.5 oz.) per gallon of water – Ideal for spot treatments*1.33 oz. bottle – Use 0.9 g (one spoonful) in 1-2 gallons of water with 2 teaspoons of a nonionic surfactant – More economical for broadcast applications

Broadcast applications (1.33 oz. bottle only):

*2/3 oz. in sufficient water for uniform application per acre – light infestations*1 1/3 oz. in sufficient water for uniform application per acre – heavy infestations*Do not exceed 4 applications per acre per season. Do not exceed 1 quart of surfactant per acre. Mix only what is needed at the time of application. Do not store unused solution.

This rate of product will control horsetail that is less than 6 inches tall and suppress horsetail that is greater than 6 inches tall. Herbicide symptoms are likely to show within 2 weeks as a necrotic ring at the base of the plant, even though the leaves and stems remain green and a deep leathery green in color.

SedgeHammer Features

May be tank mixed with Glyphosate herbicides in areas such as rights-of-way or fallow land.

Convenient pre-measured packets or scoop included with 1.33 oz. bottle.

Small (13.5 g) packets already contain surfactant.

Superior control of yellow and purples nutsedges.

People and pets may return to treatment area once spray is dry.

Labeled for use in a variety of warm and cool weather turfgrasses.

Extra Tips for Using SedgeHammer

For best results, do not mow turf for 2 days before or 2 days after application.

SedgeHammer is effective if no rainfall occurs within 3 hours, but best results are obtained with no rainfall or irrigation for at least 4 hours.

Use only in established turfgrass: allow turf to develop a good root system and uniform stand before application.

Results may take 5-7 days to begin to appear.

Do not apply when turfgrass or nutsedge is under stress.

Do not apply when temperatures exceed 85 degrees F.

Do not apply to golf course putting greens.

For transplanted woody ornamentals, allow 3 months after transplanting before applying this product.

When using in fallow areas, allow 4 weeks between application and transplanting of woody ornamentals or seeding or sodding of turfgrass.

SedgeHammer may remain active in the soil up to 3 years after application.

I've been fighting nutsedge for several years using nutsedge and crabgrass control products. They were disgustingly ineffective. I read of other people's experience with SedgeHammer on a daylily web page and decided to try it. Two days after spraying, the nutsedge started turning brown. Of equal importance, the daylilies surrounding it did not. They show no evidence of ever being near an herbicide. Am I satisfied? You bet!

I hate nut grass. It has been a problem for me from my first yard. I have used Roundup with an eye dropper and even a hypodermic syringe to kill the stuff. Then a man recommended SedgeHammer. The price was a little frightening but my resolve was firm. I bought it from DoMyOwnPestControl.com, received it promptly and used it with great success. The yellow nut grass began dying in 3 days and now is gone. I don't know if it will remain "gone", but I have enough of the stuff to "kill" it repeatedly.

Sedgehammer - THE solution for nutsegeBy Len in Carrollton, VA on 09/02/2010

This hot, dry summer we've been having here in Tidewater, Virginia has been awful for the fescue we grow here but perfect for nutsedge. My infestation was extensive. A few tips: Follow all the advice given in the instructions. Make sure the nutsedge has almost a week of growth on it; this is important. If the sedge is too small or you try to use it on a freshly cut lawn, the sedge won't have enough surface area to absorb sufficient herbicide to be effective. Also, make sure you sure use surfactent with the hebicide, it will help this very expensive chemical be absorbed more effectively by the sedge. Give the chemical time to work; the longer you can wait before mowing after application (I waited almost a week before mowing) the better the killoff. By that time (a week after application) I had an almost 95% killoff, the few live sedges were those few I had missed on the first application. One more application on the stragglers will finish the job.

Despite the fact that SedgeHammer is very expensive, I do not regret purchasing it because it WORKS! I bought the largest bottle which I think makes up to 40 gallons. So, I'll have enough to last me a few years. I recommend using an herbicide pump sprayer. I bought a Round-Up brand 2-gallon sprayer for $20 and it allows me to not waste as much SedgeHammer as I would if I used a watering can. I had A LOT of well-established sedge. About 7-10 days after the first application the sedge turned yellow and stopped growing and the grass was NOT harmed. I just did a second application because I had missed a lot sedge plants during the first application. This product is worth the $$.

I have been using this product for several years, and have found it to be the most effective for control of sedge, particularly in beds and around ornamentals in combination with Roundup. Because I am blessed with rich soil, everything grows well - sedge too; so control of sedge is an ongoing battle. The granular form of the product is convenient and easy to measure with the included measuring spoon.

After trying Nutgrass Killer II at a much more expensive price with no indication of improvement after precisely following the manufacturers instructions, I was not expecting much from SedgeHammer. In fact I purchased enough product for 3 applications fully expecting that one would not completely get rid of the Nut Sedge in our Tall Grass Fescue lawn. To my delight it appears that we have NO surviving plants. Surely I am wrong, but a few weeks have passed and I see nary a plant lift its head with absolutely no indication of stress to our Fescue. I am a believer.

I've tried a few different products with moderate success. I had several areas with a thick infestations. After one treatment and waiting about 10 days the plants were 95% gone. I applied a second treatment to the reaming plants and all but a few were dead within another 10 days. From time to time a new plant will start to pop up. I spray it and 10 days later it's dead. This stuff works 100% better than anything else I've tried.

Well living in Georgia, received product in 2 days followed instruction and applied by donning heavy duty rubber gloves covered by brown garden gloves, soaked hand in bucket of solution then rubbed hand on leaflets of weed. This method was used because weeds are in junipers bed. It's been about a week since application, have not noticed any browning or dying back, staying positive. Will update.

I had several patches of nut sedge in gardens and lawn that I treated with Sedgehammer. In a week signs of sick plants were evident and although individual plants returned, they were sparse. It will take persistence to get all the bits of roots killed but the product appears to have gotten the majority on the first spraying. This is much better success than with Roundup or other products.

I was very pleased with the product. It did the job. I tried another product to control nutsedge and it killed my grass in one area and the nutsedge came back with a vengeance. So far I'm a happy camper!

QAfter I mix 2 gallons of Sedgehammer, how long will it remain effective?I have my nutsedge down to a small area with only a dozen colonies so I mix 2 gallons and fill a one quart spray bottle for convenience. How long will the remaining liquid product remain effective?

ATypically it is not recommended to leave any pesticide solution in a sprayer for more than two weeks at a time. You should only mix what you plan on using. If you want to leave the product in the sprayer for longer you should at least shake and agitate the sprayer every few days to keep the solution from separating.

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08/12/2013
C from Baton Rouge, La

QI notice that you recommend that Sedgehammer not be applied when temps are over 85F.Can it be safely applied in the early morning prior to the high afternoon temps to avoid damaging other plants?

AYou can safely apply Sedgehammer in the early morning to avoid damaging other plants, it is only during application do you want to avoid spraying when temps are above 85F

54 of 55 people found this answer helpful.
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02/10/2013
Fred

QHow long does Sedgehammer take to break down?I had a bad infestation of nut grass in a garden bed which I have since sprayed.
How long before I can safely use it as a vegetable garden?

AWe checked with the manufacturer on this one and they told us that the product can stay active in the soil for up to 3 years and a veggie garden should not be planted in this area for at least 3 years.

50 of 51 people found this answer helpful.
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07/11/2011
Laurence

QWhat surfactant should I use with the Sedgehammer Herbicide?Is there a preference as to which type? I noticed there are varying types, Non-Ionic, DyneAmic. Please advise as I plan to purchase ASAP. Thanks

AAll the surfactants on our website are non-ionic which is the type of surfactant the manufacturer of SedgeHammer herbicide recommends for use with their product in the bottle size (1.33 oz). The 13.5 gram pack of SedgeHammer already includes a built-in surfactant.

48 of 53 people found this answer helpful.
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08/02/2013
George from Warminster Pa.

QWhen is the best time to apply Sledgehammer, before or after cutting your lawn?

AWe recommend to apply Sedgehammer two days after mowing your lawn. This will allow the weeds to be more open to absorbing the Sedghammer. You also want to wait at least 2 days before mowing your lawn after application.

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Most Recent Customer Questions

09/08/2017
Kris from St. Albans, Vermont

QWhat's the minimum temperature for an effective kill with SedgeHammer Herbicide?I live in the north and its early fall, so getting a day above 60 is not a guaranty.

QWill Sedgehammer Herbicide harm my roses?I have nutgrass growing in my rose garden, & I want to get grid of it. If I spray the nutgrass with Sedgehammer, will it also affect my roses.

A

Sedgehammer Herbicide kills nutsedge without injury to turfgrass, established ornamentals, shrubs, and/or trees. This would be safe to use around your roses as long as you are not spraying them directly and they are well-established plants. †You should make†direct treatments to the nutsedge only†as it cannot be used as an over-the-top spray to desirable flowers.

QCan SedgeHammer Herbicide be sprayed around trees and in flower beds.Can I use another product mixed with it? And can i spray and fertilize at the same time?

A

SedgeHammer Herbicide can be applied to turfgrass, established ornamentals, shrubs, and/or trees. It should not be applied as an over-the-top spray to desirable flowers, ornamentals, vegetables, shrubs, or trees. We always recommend doing a sample†tank mix first when mixing with other products to make sure that everything mixes well.†

Sedgehammer Herbicide kills kyllinga, purple and yellow nutsedge. It will eliminate the entire weed. You may need to do more than one application. Be sure to wait at least three weeks between applications.

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10/27/2016
Renee from Napoleonville

QCan I still apply SedgeHammer Herbicide this late in the season?I live in south Louisiana and have nut sedge actively growing. It was 84 degrees today (Oct 27th).

A

Temperatures can have an effect on the SedgeHammer Herbicide. As long as the nutsedge is still actively growing it can be applied. Colder temperatures can prohibit growth of weeds, but you should still get usage out of the product with those temperatures.†

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10/03/2016
Dan from Fort Worth, Tx

QCan I add food color to show coverage on the lawn when using SedgeHammer Herbicide?Will colorant affect it?

A

You can use a spray indicator when applying herbicides like SedgeHammer Herbicide. We would recommend using a product that is specifically made for this use to ensure that it does not interfere with the efficacy of the herbicide. You can browse our Spray Indicators here.

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09/22/2016
Eugene

QWill SedgeHammer Herbicide stop any weed from germinating?

A

SedgeHammer Herbicide is considered a post-emergent,†therefore†the weeds need to be actively growing in order for this product to work successfully. Please let us know if we can be of any further assistance.†

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